基于运动波数值扩散的洪水演算方法

摘要

Based on the discretion of linear kinematic-wave equation by the finite difference method and the concept of numerical dispersion a method is developed to model the physical dispersion. The Muskingum-Cunge routing model and the routing model with a prediction duration are developed in this paper. The models have been applied to the flood routing for a practical channel, and good results are obtained.%基于运动波方程差分解的数值扩散在一定条件下可以模拟扩散波物理扩散的新途径，对马斯京根-康吉洪水演算方法和具有预见期的洪水演算方法进行了分析，给出了方法的稳定性条件.对两条天然河道的应用表明，洪峰流量、峰现时间和过程线等的预报精度均达到了《水文情报预报规范》的要求.